Also, I'm not sure how you got to this being about scientific / rational beliefs. I'd posit a persons emotion response to music is as irrational and unscientific as they come. Changing ones mind about music down the track (pun!) has nothing to do with an analysis of the data because, with regard to music, "good" is entirely subjective, as distinct from "quality" with regard to acuity.

I think this is the part of the 'science' that some people take issue with. The 'scientific method' isn't always an appropriate way to view everything.